1990 Yamaha pro 50 , how to connect and wire?

I am in a boat restore, and have a Yamaha 1990 pro 50, 50 hp 2stroke outboard that has been hung,
but did not come with the boat. Since all the wood needed to be replaced, the throttle controls and wiring to the gauges
from the remote control are not attached. I purchased a Seloc Repair Manual, and have downloaded the owners
manual for the model year, but no where do I see a simple guide to wiring attachment or connections.

If someone can point me in the right direction, I figure people do it all the time without paying someone